In the section 'ACCESSING ANOTHER TASK'S CREDENTIALS', the fileDocumentation/credentials.txt says:

> A function need not get RCU read lock to use __task_cred() if it is holding a> spinlock at the time as this implicitly holds the RCU read lock.

AIUI, that is not actually right any more, is it? A spinlock does notsuffice as it does not necessarily imply an RCU read-side critical section(anymore). Of course the spinlock specifically protecting updates wouldsuffice, but that's not what this is saying.